For the falling object only force acting is the gravity.
So it took 3.5 s to hit the ground.
Let the elevator is at a height H from the ground,
Here u is the initial velocty of the falling object, which is zero here.
The elevator reached at a height H in 3s of time
ig pelod. : An elevator accelerates from the ground with a uniform ac- celeration a. After...
You board a stationary elevator on the ground floor. A uniform vertical gravitational field g = −9.8m/s2 is present. Before the elevator starts moving, you drop a ball from a height of 2 m above the floor. a) How long does it take for the ball to reach the floor of the elevator? b) How long does it take for the ball to travel from the floor to its maximum height above the floor (at which point you catch it...
An elevator carries a group of people from the ground floor to the third floor of a building. The elevator and passengers have a combined mass of 2600 kg. The height of one floor is 4.5 m. If the elevator moves at a constant speed and goes from the ground floor to the third floor in one minute, calculate the work done on the elevator by gravity, the work done on the elevator by the cable, the kinetic energy of...
While riding an open freight elevator upwards at 5.4 m/s, a carpenter drops his hammer off the side. It hits the ground 2.4 s later. How far above the ground was the carpenter when he dropped the hammer?
1. A car accelerates from zero to 105 km/h in 5.21 s. What is its average acceleration in km/h/s and m/s? 2. An object moving in the x-direction has a position described by the function x(t) - 6.30t + 8.70t2, where t is in seconds and x is in meters. What is the acceleration as a function of time? The figure shows the graph of v vs t for the motion of a motorcyle that starts from rest and moves...
E. Suppose you are standing on the scale in the elevator and the
elevator is accelerating downward with
an acceleration smaller than 9.8 m/s2
i. Draw free-body diagrams of yourself, the scale, and the floor
of the elevator where it interacts
with the scale.
ii. How must the magnitude of the force exerted by the scale on
you compare with your own
weight?
iii. How must the reading on the scale compare with the reading
you make when the elevator...
how high will a tennis ball, dropped from a helicopter, bounce after it hits the ground? (Cd=0.5 and e=0.74)
An Estes toy rocket accelerates in a straight line direction from the ground at 27.0 m/s2, and at an angle of 53.0° above the horizontal while the engine is burning fuel. The rocket fuel burns out after 3.7 s and the rocket takes a projectile path to the ground. Find its horizontal distance from the launch point to where it hits the ground.
An Estes toy rocket accelerates in a straight line direction from the ground at 32.0 m/s2, and at an angle of 54.0° above the horizontal while the engine is burning fuel. The rocket fuel burns out after 3.7 s and the rocket takes a projectile path to the ground. Find its horizontal distance from the launch point to where it hits the ground. (m)
An Estes toy rocket accelerates in a straight line direction from the ground at 27.0 m/s2, and at an angle of 53.0° above the horizontal while the engine is burning fuel. The rocket fuel burns out after 3.7 s and the rocket takes a projectile path to the ground. Find its horizontal distance from the launch point to where it hits the ground. in M
An Estes toy rocket accelerates in a straight line direction from the ground at 34.0 m/s2, and at an angle of 51.0° above the horizontal while the engine is burning fuel. The rocket fuel burns out after 3.6 s and the rocket takes a projectile path to the ground. Find its horizontal distance from the launch point to where it hits the ground. m